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  <title>Determine terminal device name</title>
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  <div id="layout-content"><div id="function.posix-ttyname" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">posix_ttyname</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">posix_ttyname</span> &mdash; <span class="dc-title">Determine terminal device name</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.posix-ttyname-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>posix_ttyname</strong></span>
    ( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$fd</code></span>
   ) : <span class="type">string</span></div>

  <p class="para rdfs-comment">
   Returns a <span class="type"><a href="language.types.string.html" class="type string">string</a></span> for the absolute path to the current
   terminal device that is open on the file descriptor
   <code class="parameter">fd</code>.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.posix-ttyname-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
 <dt>
<code class="parameter">fd</code></dt>

 <dd>

  <p class="para">
   The file descriptor, which is expected to be either a file
   <span class="type"><a href="language.types.resource.html" class="type resource">resource</a></span> or an <span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>. An <span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>
   will be assumed to be a file descriptor that can be passed directly to
   the underlying system call.
  </p>
  <p class="para">
   In almost all cases, you will want to provide a file <span class="type"><a href="language.types.resource.html" class="type resource">resource</a></span>.
  </p>
 </dd>


   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.posix-ttyname-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   On success, returns a <span class="type"><a href="language.types.string.html" class="type string">string</a></span> of the absolute path of the
   <code class="parameter">fd</code>. On failure, returns <strong><code>FALSE</code></strong>
  </p>
 </div>


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